JPS6012710Y2 - Holding device for head parts - Google Patents

Description

【考案の詳細な説明】 本考案は、ビット案内孔が形成されたノーズに一対のジ
ョーを、その先端がビット案内孔の下方で互いに閉じ勝
手となるよう設けて、両ジョーの先端間で頭付部品を保
持すべくした頭付部品の保持装置に関する。[Detailed description of the invention] The present invention has a pair of jaws on a nose in which a bit guide hole is formed so that their tips can close together below the bit guide hole. The present invention relates to a holding device for a head-mounted component that is intended to hold a mounted component.

ここに、頭付部品とは、ねじやリベット等を総称し、い
わゆる円柱状をなした足部と該足部より径大な頭部を有
した部品をいう。Here, the term "headed component" refers to a general term for screws, rivets, etc., and refers to a component having a so-called cylindrical foot and a head having a larger diameter than the foot.

この種頭付部品の保持装置は、一般に自動ねじ締め機に
おいてビットがビット案内孔を下方動してワークに対し
ねじ締め作用する間、当該ねじを一定姿勢に保持するた
めに必要とされる。This type of head component holding device is generally required in an automatic screw tightening machine to hold the screw in a constant position while the bit moves downward through the bit guide hole and tightens the screw onto the workpiece.

そのため、ねじ保持作用をなす主要部なる一対のジョー
の先端を、適当な押圧力で互いに閉じ勝手に付勢し、ま
たジョー先端対向面にねじ保持用の円弧状溝を形成して
いる。Therefore, the tips of the pair of jaws, which are the main parts that perform the screw holding action, are urged to close each other with an appropriate pressing force, and an arcuate groove for holding the screw is formed on the surface facing the tips of the jaws.

しかして従来においてこのねじ保持用の円弧状溝は、第
４図Ａのジョー底面図に４１．４２で示すように、その
溝径をねじの足部の径に等しく形成しているため、次の
ような支障、欠点がある。However, in the past, the arcuate groove for holding the screw was formed with a groove diameter equal to the diameter of the foot of the screw, as shown at 41.42 in the bottom view of the jaw in Fig. 4A. There are obstacles and drawbacks such as.

第１に、ビットの下方動によってねじが押出される際は
、同図Ｂに示すようにジョー４３，４４先端がねじ４５
の頭部４５ａの通過を許容せねばならないため、その開
き量りが非常に大きくなる。First, when the screw is pushed out by the downward movement of the bit, the tips of the jaws 43 and 44 are pressed against the screw 45 as shown in FIG.
Since it is necessary to allow the head 45a to pass through, the amount of opening becomes very large.

そのため、第５図に示すようなワークの狭い凹部底面４
６に対するねじ締めは、ジョーの開き量が凹部側壁４７
によって規制される結果、不可能となる。Therefore, the bottom surface 4 of the narrow recess of the workpiece as shown in FIG.
When tightening the screw for 6, the opening amount of the jaw is
As a result of being regulated by

第２に、ねじ４５の頭部４５ａがジョー４３．４４先端
を通過する際、溝４１．４２の両端角部４１ａ、４２ａ
と点接触乃至は線接触するため、ねじの頭部４５ａ外周
縁が傷つき、それが適用されたワークの意匠観を損なう
ことがある。Second, when the head 45a of the screw 45 passes the tip of the jaw 43.44, the corner portions 41a and 42a of the groove 41.42 are
Because of the point or line contact with the screw head 45a, the outer periphery of the screw head 45a may be damaged, which may impair the design of the workpiece to which it is applied.

そしてこれを防止するためには、前記溝角部４「ａ、４
２ａを研削して丸みをもたせるという面倒で手間のかか
る研削作業が必要である。In order to prevent this, it is necessary to
It is necessary to perform a cumbersome and time-consuming grinding operation of grinding 2a to give it a rounded shape.

本考案は、このような従来手段における欠点を遂−解消
する有用な、ねじ等頭付部品の保持装置を提供するもの
である。The present invention provides a useful device for holding headed parts such as screws, which overcomes the drawbacks of the conventional means.

以下に本考案の一実施例を図面に基づき説明する。An embodiment of the present invention will be described below based on the drawings.

第１図Ａは頭付部品の保持装置の側面断面図、同図Ｂは
図ＡのＡ−Ａ断面図を示し、図中１１はノーズで、内部
にビット１２の案内孔１３が上下方向に形成され、また
、部品供給孔１４がこの案内孔１３に合流するよう斜め
方向に形成されている。Figure 1A is a side sectional view of the holding device for the head component, and Figure 1B is a sectional view taken along the line A-A in Figure A. In the figure, 11 is a nose, inside which the guide hole 13 for the bit 12 is arranged vertically. Further, the component supply hole 14 is formed in an oblique direction so as to merge with the guide hole 13.

１５．１６は、前記ノーズ１１の左右側面にピン１７を
介して枢支された一対のジョーで、コイルスプリング１
８の弾性力によりその先端１５ａ、１６ａが前記ビット
案内孔１３の下方で閉じ勝手に押圧付勢されている。15 and 16 are a pair of jaws that are pivotally supported on the left and right side surfaces of the nose 11 via pins 17;
The ends 15a, 16a of the bit guide hole 13 are urged to close by the elastic force of the bit guide hole 13.

１９，２０はこのジョー先端１５ａ、１６ａの対向する
面に形成された頭付部品保持用の円弧状溝である。Reference numerals 19 and 20 denote arcuate grooves for holding headed components formed on opposing surfaces of the jaw tips 15a and 16a.

この円弧状溝１９．２０は第２図Ａのジョー底面図に示
すように、その円弧径Ｒが部品２１の頭部２１ａの半径
（Ｄ／２）に等しく、且つジョー先端１５ａ、１６ａが
閉じた状態において両溝１９，２０の最大間隔１が部品
２１の足部２１ｂの直径ｄに等しくなるように形成され
ている。As shown in the bottom view of the jaws in FIG. In this state, the maximum distance 1 between the grooves 19 and 20 is formed to be equal to the diameter d of the foot portion 21b of the component 21.

従ってこの構成によれば、部品供給孔１４を通じて供給
された頭付部品２１は第３図Ａ、 Ｂに示すようにその
足部２１ｂをｉ１９，２０に挿入した状態で、保持され
るし、また下方動してきたビット１２により押し出され
る際のジョー先端１５ａ、１６ａの開き量は、溝１９．
２０の内縁が部品頭部２１ａの外縁に面接触する足る開
き量Ｌ′、即ち両溝１９．２０の内縁が部品頭部２１ａ
と同一径の円を形成するのに必要な開き量Ｌ′で足りる
。Therefore, according to this configuration, the headed part 21 supplied through the part supply hole 14 is held with its foot part 21b inserted into i19, 20 as shown in FIGS. 3A and 3B, and The opening amount of the jaw tips 15a, 16a when pushed out by the bit 12 that has moved downward is determined by the groove 19.
Sufficient opening L' for the inner edges of the grooves 19 and 20 to be in surface contact with the outer edges of the component head 21a, that is, the inner edges of both grooves 19 and 20 are in surface contact with the outer edges of the component head 21a.
The opening amount L' required to form a circle with the same diameter as is sufficient.

この開き量Ｌ′は当然の事ながら第４図Ｂに示した従来
手段における開き量りより少なくなる。This opening amount L' is naturally smaller than the opening amount in the conventional means shown in FIG. 4B.

従って、ワークの狭い凹部底面に対してのねじ締めも、
ジョー外側面が凹部側壁に当接するおそれがないため支
障なく行なうことができる。Therefore, tightening screws to the bottom of a narrow concave part of a workpiece is also easy.
Since there is no risk that the outer surface of the jaw will come into contact with the side wall of the recess, this can be done without any problem.

また、部品の頭部２１ａがジョー先端を通過する際、溝
１９．２０は頭部２１ａの外周縁と面接触するため、頭
部２１ａ外周縁を傷つけるおそれもなくなる。Furthermore, when the head 21a of the component passes through the jaw tip, the grooves 19, 20 come into surface contact with the outer periphery of the head 21a, so there is no risk of damaging the outer periphery of the head 21a.

本考案に係る頭付部品の保持装置は以上説明したように
、一対ジョー先端に対向して形成する頭付部品保持用円
弧状溝を、その円弧径が頭付部品の頭部の半径に等しく
且つジョー先端が閉じた状態において両溝の最大間隔が
頭付部品の足部の直径に等しくなるよう形成したもので
あるから、部品頭部がジョー先端を通過するには両溝の
内縁が部品頭部の外縁と面接触するに足りる量だけジョ
ー先端が開けば良く、従ってその開き量を従来に比して
著しく少なくすることができ、ワークの狭い凹部に対し
ても作業性良くねじ締め等の作業を行なうことができる
ものである。As explained above, the device for holding a headed component according to the present invention has an arc-shaped groove for holding a headed component formed opposite to the tips of a pair of jaws, the arc diameter of which is equal to the radius of the head of the headed component. In addition, when the jaw tip is closed, the maximum distance between both grooves is formed so that it is equal to the diameter of the foot of the head component, so the inner edges of both grooves must be close to the component in order for the component head to pass through the jaw tip. The tip of the jaw only needs to be opened by a sufficient amount to make surface contact with the outer edge of the head. Therefore, the amount of opening can be significantly reduced compared to conventional methods, making it easy to tighten screws even in narrow recesses of workpieces. It is possible to perform the following tasks.

加えて、部品頭部の通過時は部品頭部と溝とが面接触す
るため、部品頭部を傷つけることがなく、従って当該部
品の適用されたワークの意匠観を高め得るものである。In addition, since the component head and the groove come into surface contact when the component head passes, the component head is not damaged, and the design of the workpiece to which the component is applied can be improved.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図Ａは本考案の一実施例としての頭付部品の保持装
置全体側面断面図、同図Ｂは図ＡのＡ−Ａ断面図、第２
図Ａは第１図の装置におけるジョーの底面図、同図Ｂは
第１図の装置にて保持される頭付部品の側面図、第３図
Ａは前記頭付部品がジョー先端に保持された状態を示す
側面図、同図Ｂはその底面図、同図Ｃは該頭付部品がジ
ョー先端を通過する際の状態を示す底面図、第４図は従
来装置のジョー先端を示す底面図で、図Ａはジョー先端
が閉じた状態を示し、図Ｂは開いた状態を示す図、第５
図はこの従来装置の作業上の欠点を説明する図である。 １１・・・・・・ノーズ、１２・・・・・・ビット、１
３・・・・・・ビット案内孔、１５．１６・・・・・・
ジョー、１５ａ、１６ａ・・・・・・ジョー先端、１９
．２０・・・・・・円弧状溝、２１・・・・・・頭付部
品、２１ａ・・・・・・頭部、２１ｂ・・・・・・足部
、Ｒ・・・・・・円弧径、１・・・・・・最大間隔。FIG. 1A is a side sectional view of the entire holding device for a head component as an embodiment of the present invention, FIG. 1B is a sectional view taken along line A-A in FIG.
Figure A is a bottom view of the jaw in the device shown in Figure 1, Figure B is a side view of the headed component held in the device shown in Figure 1, and Figure 3 A is a side view of the headed component held at the tip of the jaw. Figure B is a bottom view, Figure C is a bottom view showing the state when the head component passes through the jaw tip, and Figure 4 is a bottom view showing the jaw tip of the conventional device. Figure A shows the state where the jaw tip is closed, Figure B shows the opened state, and the fifth
The figure is a diagram illustrating the operational disadvantages of this conventional device. 11...Nose, 12...Bit, 1
3...Bit guide hole, 15.16...
Jaws, 15a, 16a...Jaw tips, 19
．． 20...Circular groove, 21...Headed part, 21a...Head, 21b...Foot, R...Circular arc Diameter, 1...Maximum spacing.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] ビット案内孔が形成されたノーズに一対のジョーを、そ
の先端がビット案内孔の下方で互いに閉じ勝手となるよ
う設けて、両ジョーの先端間で頭付部品を保持すべくな
した頭付部品保持装置において、前記一対のジョー先端
に対向して形成する頭付部品保持用円弧状溝を、その円
弧径が頭付部品の頭部の半径に等しく且つジョー先端が
閉じた状態において両溝の最大間隔が頭付部品の足部の
直径に等しくなるよう形成したことを特徴とする頭付部
品の保持装置。A headed part having a pair of jaws on a nose in which a bit guide hole is formed so that the tips of the jaws can close each other below the bit guide hole, and holding the headed part between the tips of both jaws. In the holding device, the circular arc-shaped groove for holding the headed component formed opposite to the tips of the pair of jaws has an arc diameter equal to the radius of the head of the headed component, and when the jaw tips are closed, both grooves are A holding device for a headed component, characterized in that the maximum interval is formed to be equal to the diameter of the foot of the headed component.